:root{--bg:#F5FAFE;--bg-deep:#E7F2FA;--surface:#FFFFFF;--surface-2:#D7EAF6;--title:#16324A;--text:#2A4156;--muted:#4E6A80;--soft:#6E8899;--brand:#4AA3E0;--bright:#6BB8EC;--deep:#1B4A6E;--mist:#EAF5FC;--border:rgba(74,163,224,.16);--border-strong:rgba(74,163,224,.42);--shadow:0 12px 28px rgba(27,74,110,.08);--max:1120px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.locked{overflow:hidden}a{color:var(--deep);text-decoration:none}a:hover{color:var(--brand)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(74,163,224,.28);outline-offset:2px}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%}.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:#fff;color:var(--deep);padding:10px 14px;border-radius:8px}.skip-link:focus{top:8px}
.topline{position:fixed;inset:0 0 auto;z-index:80;height:22px;background:var(--deep);color:#fff}.topline-inner{width:min(var(--max),calc(100% - 32px));height:22px;margin:auto;display:flex;align-items:center;justify-content:space-between}.topline-brand{font-size:12px;line-height:1;letter-spacing:.03em}.top-search-button{min-height:22px;padding:0 4px;border:0;background:transparent;color:#fff;font-size:12px}.masthead{position:fixed;top:22px;left:0;right:0;z-index:79;height:60px;background:#fff;border-bottom:1px solid var(--border)}.masthead-inner{width:min(var(--max),calc(100% - 32px));height:60px;margin:auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.masthead-logo{justify-self:start;min-width:44px;min-height:44px;display:inline-flex;align-items:center}.logo-image{width:auto;height:28px;object-fit:contain;object-position:center}.logo-fallback{font-weight:800;font-size:20px;color:var(--deep);letter-spacing:.02em}.drawer-button{min-width:76px;min-height:44px;border-radius:11px;border:1px solid var(--border-strong);background:var(--mist);color:var(--deep);font-weight:700}.app-link{justify-self:end;min-height:44px;display:inline-flex;align-items:center;padding:0 14px;border-radius:11px;background:linear-gradient(135deg,#6BB8EC 0%,#4AA3E0 55%,#1B4A6E 100%);color:#fff;font-size:14px;font-weight:700}.app-link:hover{color:#fff;filter:brightness(.98)}
.section-tabs{position:fixed;top:82px;left:0;right:0;z-index:78;height:40px;background:var(--mist);border-bottom:1px solid var(--border)}.section-tabs-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px}.section-tabs a{min-width:78px;min-height:32px;padding:4px 16px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;color:var(--deep);font-size:13px}.section-tabs a.active{background:var(--brand);color:#fff}.site-main{min-height:60vh;padding:154px 16px 48px}.container{width:min(var(--max),100%);margin:0 auto}.page-hero{margin-bottom:24px;padding:26px;border:1px solid var(--border);border-radius:14px;background:#fff;box-shadow:var(--shadow)}.page-kicker{display:inline-block;margin-bottom:8px;color:var(--brand);font-size:13px;font-weight:800;letter-spacing:.08em}h1,h2,h3{color:var(--title);margin-top:0}h1{margin-bottom:12px;font-size:24px;line-height:1.3}h2{font-size:20px;line-height:1.4}h3{font-size:16px;line-height:1.45}p{margin:0 0 14px}.lead{max-width:820px;margin-bottom:0;color:var(--muted)}
.section{margin:22px 0;padding:24px;border:1px solid var(--border);border-radius:14px;background:#fff;box-shadow:var(--shadow)}.section.mist{background:var(--mist)}.section.deep{background:var(--deep);color:#fff}.section.deep h2,.section.deep h3,.section.deep a{color:#fff}.grid-2,.grid-3,.grid-4{display:grid;gap:16px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{padding:18px;border:1px solid var(--border);border-radius:12px;background:#fff;min-width:0}.card p:last-child,.section p:last-child{margin-bottom:0}.card-link{display:inline-flex;min-height:44px;align-items:center;font-weight:700}.image-slot{width:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;border:1px solid var(--border);border-radius:12px;background:var(--mist)}.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.image-slot.banner{height:260px}.image-slot.medium{height:200px}.image-slot.card-image{height:180px;margin-bottom:14px}.image-slot.app-image{height:360px}.image-slot.brand-image{height:220px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.button{min-height:44px;padding:0 18px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;white-space:nowrap}.button.primary{color:#fff;background:linear-gradient(135deg,#6BB8EC 0%,#4AA3E0 55%,#1B4A6E 100%)}.button.primary:hover{color:#fff}.button.secondary{color:var(--deep);background:#fff;border:1px solid var(--border-strong)}
.numbered-list,.plain-list,.timeline,.archive-list,.faq-list{list-style:none;margin:0;padding:0}.numbered-list li{display:grid;grid-template-columns:52px 1fr;gap:14px;padding:16px 0;border-bottom:1px solid var(--border)}.numbered-list li:last-child{border-bottom:0}.num{color:var(--brand);font-size:24px;line-height:1;font-weight:900}.plain-list li{padding:12px 0;border-bottom:1px solid var(--border)}.plain-list li:last-child{border-bottom:0}.archive-list{display:grid;gap:12px}.archive-list li{padding:16px;border:1px solid var(--border);border-radius:12px;background:#fff}.archive-list strong{display:block;color:var(--title);margin-bottom:4px}.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:8px;top:10px;bottom:10px;width:2px;background:var(--surface-2)}.timeline li{position:relative;padding:0 0 22px 14px}.timeline li:before{content:"";position:absolute;width:12px;height:12px;left:-25px;top:7px;border-radius:50%;background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 1px var(--border-strong)}.status{display:inline-flex;align-items:center;min-height:26px;padding:2px 9px;border-radius:999px;background:var(--mist);color:var(--deep);font-size:12px;font-weight:800}.faq-list details{border-bottom:1px solid var(--border);padding:14px 0}.faq-list summary{cursor:pointer;color:var(--title);font-weight:800}.faq-list details p{padding-top:10px;margin:0;color:var(--muted)}
.site-footer{background:var(--deep);color:#E7F2FA;border-top:1px solid rgba(234,245,252,.25)}.footer-inner{width:min(var(--max),calc(100% - 32px));margin:auto;padding:34px 0 78px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:22px}.footer-brand-mark{min-width:44px}.footer-brand strong,.footer-brand span{display:block;color:#fff}.footer-brand span{font-size:13px;color:#E7F2FA}.footer-logo-fallback{color:#fff}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:20px 0;border-top:1px solid rgba(234,245,252,.2);border-bottom:1px solid rgba(234,245,252,.2)}.footer-links h2{margin-bottom:8px;color:#fff;font-size:13px}.footer-links a{display:block;width:fit-content;min-height:32px;color:#E7F2FA;font-size:13px}.footer-links a:hover{color:#fff}.footer-note,.copyright{margin-top:16px;color:#E7F2FA;font-size:13px}
.overlay{position:fixed;inset:0;z-index:100;opacity:0;visibility:hidden;pointer-events:none;background:rgba(22,50,74,.42);transition:opacity .2s ease,visibility .2s ease}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.issue-drawer{position:fixed;top:0;right:0;bottom:0;z-index:110;width:min(400px,86vw);transform:translateX(105%);visibility:hidden;pointer-events:none;background:#fff;box-shadow:-20px 0 40px rgba(27,74,110,.16);transition:transform .24s ease,visibility .24s ease}.issue-drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:68px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.drawer-brand{display:flex;align-items:center;gap:10px;color:var(--title)}.icon-button{min-width:44px;min-height:44px;padding:0 12px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--deep)}.drawer-scroll{height:calc(100% - 68px);overflow-y:auto;padding:12px 16px 28px}.drawer-scroll section{padding:10px 0}.drawer-scroll h2{margin-bottom:6px;font-size:13px;color:var(--soft)}.drawer-scroll a{display:block;min-height:56px;padding:10px 12px;border-radius:10px}.drawer-scroll a:hover{background:var(--mist)}.drawer-scroll a strong,.drawer-scroll a span{display:block}.drawer-scroll a strong{color:var(--title)}.drawer-scroll a span{margin-top:2px;color:var(--muted);font-size:13px;line-height:1.45}
.search-layer{position:fixed;top:82px;left:0;right:0;z-index:105;visibility:hidden;pointer-events:none;opacity:0;transition:opacity .2s ease,visibility .2s ease}.search-layer.open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(720px,calc(100% - 32px));margin:16px auto 0;padding:20px;border:1px solid var(--border-strong);border-radius:14px;background:#fff;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.search-head h2{margin:0}.search-card label{display:block;margin-bottom:6px;color:var(--muted)}.search-card input{width:100%;min-height:44px;padding:0 12px;border:1px solid var(--border-strong);border-radius:10px;background:var(--bg);color:var(--text)}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.search-presets a{min-height:40px;padding:6px 12px;display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:10px;background:var(--mist)}.mobile-bar{display:none}.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.meta-chip{display:inline-flex;min-height:28px;align-items:center;padding:2px 10px;border:1px solid var(--border);border-radius:999px;color:var(--muted);background:var(--mist);font-size:12px}.split{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
@media(max-width:860px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:1fr}.split{grid-template-columns:1fr}}
@media(max-width:700px){.section-tabs{display:none}.site-main{padding-top:106px;padding-bottom:74px}.masthead-inner{width:calc(100% - 20px);gap:6px;grid-template-columns:1fr auto 1fr}.masthead-logo{min-width:44px}.drawer-button{min-width:70px}.app-link{padding:0 10px}.topline-inner{width:calc(100% - 20px)}.page-hero,.section{padding:18px}.grid-2,.grid-4{grid-template-columns:1fr}.image-slot.banner{height:260px}.image-slot.app-image{height:340px}.footer-links{grid-template-columns:repeat(2,1fr)}.footer-inner{padding-bottom:96px}.mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:grid;grid-template-columns:repeat(5,1fr);min-height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border-strong);box-shadow:0 -8px 24px rgba(27,74,110,.08)}.mobile-bar a{min-width:0;min-height:48px;display:flex;align-items:center;justify-content:center;color:var(--deep);font-size:13px}.mobile-bar a.active{background:var(--brand);color:#fff}.search-layer{top:0;bottom:0;z-index:120;background:var(--deep)}.search-card{width:100%;height:100%;margin:0;border:0;border-radius:0;background:var(--deep);color:#fff;padding:calc(20px + env(safe-area-inset-top)) 18px 24px;overflow-y:auto}.search-card h2,.search-card label,.search-card p,.search-card a{color:#fff}.search-card input{background:#fff;color:var(--text)}.search-presets a{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.22)}.search-card .icon-button{color:#fff;background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.24)}}

/* Accessible hit areas and reusable spacing */
.app-icon{width:48px;height:48px;object-fit:contain;object-position:center}
.mt-16{margin-top:16px}
.footer-links a,.search-presets a{min-height:44px;display:flex;align-items:center}
.top-search-button,.section-tabs a{position:relative}
.top-search-button{min-width:44px}
.top-search-button::before{content:"";position:absolute;inset:-11px 0}
.section-tabs a::before{content:"";position:absolute;inset:-2px 0}